Typewriting machine



Se t. 1

p 20 927 w. A. DoBsoN- TYPEWRITING MACHINE 3 Sheets-Sheet l l Filed NOV. 26.- 1924 Affe/wey;

w. A. DOB-SON TYPEWRIIING MACHlNE Sept. 20, 1927.

Filed Nov. 26. 1924 5 Sheets-Sheet 2 Sept. 20,1927. 1,643,114

w. A. DoBsoN TYPEWRITING MACHINE Filed NOV. 26. 1924 5 Sheets-Sheet 3 ff REAR Wsw Patented Sept. 20, 1927'.l

i A 1,643,114 :PAT-ENT ycritics..

ILLIAlVI A. DOBSON, OFVIBRIDGEPORT, CONNECTICUT, sASSIGNOR TO .UNDERWOOD TYPE- WRITER COMPANY, OF NEWYYQRK, N. Y ACORPORATIONOF DELAWARE.

Application inea Nvemterlzcyisae. seriarno. 752,316.

T his invention relates to casings in 'which through the casing andforthe travelythere- V along of the operating. arms which are mounted on theA carriage and vmove theref with on the machine.

One ,feature of this invention relates to.

t-he construction ofthe casing with A'the obj ect in view of minimizing the cost of manufacture. 4

This invention relates further to the construction of the casing which is made of a plurality of sections, including two side frames or plates; which may be madeof cast metal, such as iron, brass, or die-cast metal, a sheet-metal plate forming the front section and having an opening for the pro-A trusion ofthe keyboard, and a rear section also made of sheet-metal andhaving at its uppermost end ahinge upon which the coverr is swung. Both the front and rear'sections are fastened to the end frames, and theresulting four sections are'inturn fastened'to a base-plate, which may also be madeof sheet-metal.

One feature of vthis invention relates to t-he manner in which the inside-panels, provided for further deadening the noise, are secured" to the outery panels, forming a double lwall. Said inside panels have formed attheir ends channels in which felt abutment stripsare seated. 4

Another feature relates to means for clamping the machine wit-hin the casing and against the front plate thereof, thus pre-r carriage-controlling levers extend to the eX- terior of the casing; Means vare provided lwhereby the opening xformed between the casing 'and the coverv through which Ithe levers l* controllingV ithe carriage extend may he adjusted. -Said means comprise an ad- Justahle ,plate rco-operating ivvith the lock which holds-thecover closed.'

There Yare also `provided novel means for holding VJthe front -pad underneath Vthe 'keylevers, said Vmeans comprising'an upwardly- Vextending plate which forms van Vintegral part-of the base-plate'andlhas formed at its ends inwardly-extending bends 'for effectively supporting therfelt'pads therein.

`Other features and advantages willhereinafter appear.

In thelaccompanying drawings,

'Figure l ,is a front view, vin elevation,

showing a vsou'nd-deadening casing partly insection. y

Figure Qis a cross-sectional view cfa lock for forcing-a typewriting :machine against the frontwall of the casing.

lFigure 3 is a horizontal cross-sectional View of the casing, showing'thelock in its normalor effective position.

'Figure '1l Yis a vertical cross-section ofthe caslng, showing "a -typewriting machine enclosed therein.

YFigure 5 is a perspective view, showing theoutercomponent vparts or sections ofthe casing. n

Figure 6 is a perspective view, showing onev end-inner panelanda portion of a rear inner ypanel relatively positioned.

'Figure 7 is a rear cross-sectional view, in elevation, showing they construction of the end frames `and `the manner in which the cover isftted to theY casing.

lFigure 8 is a fragmentary cross-sectional view, in elevation, .showing the lock which holds the cover closed and adjustments therefor.

`Figure 9'is a-plan'view of the trated in'Figure`8. y

:The LUnderwood typewriting vmachine comprises amain frame lO'provided with a -lock villus- `forward extension l2 'in .which are positioned banks of `keys for yoperating typebars (not shown), ,to cause types carried therebyto print against a lplaten 13 journaled vin Vtheend walls yof a platen-frame. Y

The platen-frame forms lpart of a carriage 15 mounted for letter-feeding movement upon rails (not shown). The carriage is provided with various iorwardly-extending lin{rer-pieces 1G :For operating' the saine, and the platen.

For deadening the sounds arising in the tyiiiing operation, there is provided a sounddeadening casing or hood comprising a bodypart and a cover 19. The body-part is made up oit a pluralityY ot parts assembled together by .means oit :fastening members 20, and comprises two end 'trames Q1 which may be either ordinair)7 sand-castings or die-castings, one rear plate Q2 and one :lront plate 223 which may he made of sheetanetal, and the :tour are assembled together and mounted upon a haseplate fll. The :t'ront section is provided with an opening for the keyboard, and also provided at its uppermost edge with a forwardly and upwardly extendingangular bend 2G for the purpose of' stiifeninfi` said plates and for supporting a felt strip sealing the opening provided ttor the carriagecontrolling linger-pieces 1G. The rear section is provided at its uppermost edge with a hinge 28 'tast to the cover 19, and also :fastened to the hack plate 22 hy means oi screws Q9.

The end frames 21 ma)1 he distinguished from each other as the right and leitt trames. The 'tormer is a plain casting having a rih 30 for reinforcing the bottom and side edges and is provided with holes 31 matching the holes l2 in the hase-plate and the holes 33 and 3l respectivelyl inatchinfg similarly|vnumbered holes .in the front and rear plates. It will he noted that holes .18 are provided in the lel't il 'ame 21 :tor matching similarlynuinhered holes in the base-plate 211C and in the :front and rear plates Q3 and Q2 respectively. The top ot' the hase-plate is covered with a sheet 59 of soundaleadennig material, which may he telt, and at the forward end of the plate over-lies the lower end or foot Gl ot a 'liront :telt lining' GO, thus holding the latter .in its proper position. Bene-.ith the plate Zei there is provided a telt pad lilas a protection for the talole upon which the casing;` stands.

The `lei i frame carries upon it a spring 39 lor raising the cover 19 and a lock 'for holding; the cover closed against the pres sure oit the sprine tending' to open the same. The advantage of mounting these two devices :in the saine :traine obvious, as such a` construe 'on lends itself to the building` of the ci ein ot light material, and eliminates the distortion that might be set up lojv the spring),4 it the loot: had been placed in one 'trame and the spring' in another, as has been the custom heretofore in similar sheetmetal easine's. ln F'pjure l the means for raising' the cover are illustrated and comprise an arm 85 pivoted on a pin 3G fast upon the lel't end 'traine 21 in the holes 40 and mounted between the ear 17 and the end iframe 21. Said arm 35 is operativelyT connected by means of a slot 37 to a roller Sts 'fast to the cover 419. A spring;l 39 wound around the pin 36 has one of its ends :tast on the arm 35 while the other end is fast to the trame. Improved means for raising; the cover including means for regulating the tension of the springl and means for `e'rau'luall)7 checking the travel of the cover are disclosed in the applicaition ot' Joseph Lii'ullnn-g` :vlerial No. 726,424, tiled July 17, 1925i (now Patent No. 1,603,781, dated October 19, 1926).

Mounted in the saine left side 'traine there is provided the lock which normallyT holds the cover closed against the Iiressure of the spring' 39. Said lock is released hy means ol a button 411, shown in Figures 8 and 9, which is operatively connected to a pawl 4t2 rocking,l on a pin Lil-23 and 'fast to the cover 19. Said pawl is controlled at its lower end by a plate il also fast to the cover 19 hy means ot screws A, spi-ine' lG actuates the pawl Ll2 forwardly to engage a lockingr piece #Ll-7 adjustably mounted on the casingv hy means ot adjusting` screws 48 and a binding' screw '19, By means ot this adjustment there mayY be regulated the pressure oit the opposite telt strips 27, 81 that close the slot through which protrude the -arriz l"fi-coutrolling tinpjerspieees. A tongue 50 rined at right angles to the diver-latch at its lowerinost end, is engr-aged hy the inner end of a sliding' stem 5l, which is liinited in` its movement by a stop-screw :'32 and carries at its outer end the hutten elle, which is returnable to a norn'ial position by means ot' a spring 58.

The hase-plate 24- has formed at its ^t`orward end the front closure 5ft under the keylevers, and is provided with clearance slots tor the different keys, and at the ends the front closure extension is provided with bent-in clips 5G for supporting: a telt .strip 57 also provided with slots 5S 'For cleanup; the keys oi the machine. lni order that the telt strip 57 may he effectively held in place, there is provided a metal stri p which is supported at the ends liv the bends 5G oit the iront closure 541-. The metal strip 7 5 is slightly bent inwardly at the center so that it will hold the lower edpge ot the lelt strip 57 against the trout closure 54. '.lhere are also provided bent-up portions 111, which form an integral part ot the hase-plate Q11, each portion having' holes 113 corresi, iondinpY with similarly-numbered holes in the iront plate 23 for fastening' the two members together.

For the purpose of 'further deadening the sounds arising' from the operation oi the machine, the end trames and the, rear plate of the casing are provided with plates or panels G2 and GS, shown in a perspective view in Figure G. Felt strips at the uppermost CII edges of the panelsco-operate gwith similar felt abutmentsin theicover forv further preventing the leakageof sound-wavesthrough the openingbetween the two panel-members.

The inner side panels 62 are shaped `for forming a sound-deadening airspace between themselves and the outer endframes, and have at their lowermost edges reflex.

is similarly reinforced at itslowermost edge bymeans of a rib 69, and terminates with inwardly-extending Vben'd's forming tabs or tongues 70 for fitting corresponding open-r ings lto the rear of the base-plate 24, and

is provided at itsluppermost. edge with a` channel 72 whichreceives the strip 73. The ends of the rear panel 68 are bentinwardly forming the rib 74 which reinforces the same and fitsthe outline of the side panels 62.

The inner wall-ofthe front plate 23 needs now to bedescribed. It consists generally of a lining of some sound-deadening material such as felt. rihe lining is positioned or retained by means of a channel-piece 76 which is fastened to the plate 23 by rivets Z Said piece 76 isshown in Figure 4, and extends the full length of the' front plate. Its section is bent rearwardly and upwardly, to for'm a retainer for the felt sealing strip 27, and .is then folded upon itself and runs downwardly forming a resilicnt extension 78 bearing on the lining 60. The holes 79are provided so that the rivets 71T may be supported while the piece 7 6 is assembled. The channel formed between the piece 7 6 and the front plate at its uppermost edge receives the felt strip 27 which co-operates with Vanother felt strip 81 supported by a metal strip 82 fast` on the cover 19 by means of fasteners 83. l

rlhe cover 19 Aismounted to swing on the hinge 28 and is yprovided vat the rear-with a continuous felt strip .supported by `a channel 84 vformed by the eXtensionof a spacedr inner sheet-metal lining 85 which is fastened to the cover 19 by means of fasteners 86 and 87. The fastener 86 is` assembled through a hole 88 in the lining 85, which Vforms an eX- tension 89 for supporting a glass 90 through which the typing in the machine is rendered visible. The glass 90m-otherwise supported by a plate 91 and screws 92. yThe sides of the cover 19 are also provided with felt strips 93, shown in Figures 1v and 7. A metal strip 94 fast to the sides -of the cover formsa doublechannel supporting both side The rear fpanel 68 isplaced parallel to the rear plate 22 forming an inner wall therefor, and

linings 95 .andthe strips 93; The strip94 isfastened to the cover 19 by means of yfas-- teners96 and extends inwardly, thendownwardly and is bent upwardly again' to form a resilient extension 9,7 whichholds the ends of the side linings 95,.` Holes 80 are provided to facilitate .the assembling of the fasteners 96. f

A vtypewriter may be inserted vin this casing, when the cover is raised, with its keyboard-extension 12 projecting forwardly through a hole in the front plate of the casing into a position where it `may be conveniently operated and for the purposeof securing the machine within the casing, and for forcing the same against the front plate thereof to thus prevent the leakage of soundwaves from the borders of the opening through which the keyboard of the machine extends, there are provided clamping means which maycomprise a rock-shaft 98'journaled in bearings 99 fast to the base-plate 24. Said rock-shaft98 is provided at its inner end with a shoe 100 covered with some soft material 101 and bearing against Athe frame 10, thus forcing the machine forward against the front plate 23. The other end of the rock-shaftV 98'carries an operating arm 102 mounted-on a pivot 103 fast on saidy shaft 98. The arm 102 is made of some resilient material and may be engaged with a hook 104 fastened to the base-plate, and held against the machine under tension due to the resiliency of said arm 102, as shown in VFigures 4 and 5, or it may be thrown backwardly to its ineffective position, as shown in Figure 2, for removing the machine. It should be noted thatthe normal position of the arm 102 is shownzin dot-anddash lines in Figure 4, `and that in order to lock the arm 102 the same has to be sprung downwardly andswung under the hook 104, a downwardly-extending portion 105 engaging with a detent-hole 106.

In order that the carriage-controlling iinger-pieces,` which extend out of the casingV through thev opening formed fbetween itself and the cover, may slide ralong the slot which is parallel-to the bottom of the cas-V ing upon which the machine rests, the carriage andthe fingerepieces therefore must be slidable in a line with said opening. It is also desirable to insert 'the machine into the casingv without altering the samev in any way, but due tothe fact that the Underwood typewriting machine is generally provided with feet of different heights in order to slightly incline the carriage guides and thus assist the carriage in its letter-feeding travel, the right-hand feet 108 are built up by means ofan interposing washer 109, while the left-hand feet 110 which have vno washer interposedfare left lower. This arrangement, however, is not essential for the operativeness of ,the zmachine and :may therefore and is in feet eliminated when the machine is enclosed :in the casing` by linildingr np the lower l'eet ll() an ernennt corresponiliin; to the thickness oi the washer All'l') by n'ieans et a plate lll.

The l'eet ot the typewriter are inade of two parts, a nietal. core 112 and a rubber ci'iveringg; inonl A'ed around said core which is made olJ square sectiiiin material, is turned down in the. renter lll and is threaded at the end ilo lor ifastiinine" the saine to the :traine et the machine. The advantage of this eenstrnction will be ailiparent as it pre vente the rnbber iroin rotating;a around the be dispensed with,

`core ll while the toet are seized to screw the saine in and ont et the traine.

`Variations may be resorted to within the scopeo' the invention, and portions oit the improvements may be used without others.

llaiing thus described iny inventioi'i, I claiin: i

l. il. sonintsnbdning casingl lor a typewriting; machine, including;4 a body-portion hafi'innj an opening;` at the iront` it'or the typewriter-hejifbmiril to project ilnrwardly therethrough, said casing also including a carriagewhaniber which iimerhangs the body ot' the casino. said body-portion including' an open 'lront plate, and also including; side walls and a rear wall, said side walls dirergi`- infr :troni their bottoms to 'torni overhangs, the upper end oit each side Wall ltorniing a lower part oit' said carriage-chamber, ineans :tor attaching said side Walls to said rear n'alh panels being spaced freni said side walls and eoertensive therewith to torni airpoeliets, ineens attaching;Y said panels to said side Walls, a panel spaced trein the rear Wall and eoextensive therewith to lorni an air-pocket nieans tor attaching;- said rear wall panel, and ineens attaching;` said front and rear wills to the trent and rear edges oit said side walls.

)i sound-snbdningg casing `for a type Writing machine, including a body-portion ha ring an opening` ai the front for the typewritei-keyboard 'to project forwardly there`- through, said body-portion including an open trent plate, and also including` side Wallsand a rear wall, ineens for attaching said side walls to said rear wall, panels beinespaeed troni said side Walls and coextensire therewith 'to 'torni air-pockets, ineens ai'iachine` said panels to said side walls, a panel spared Atroni the rear wall and coexiensire therewith to loi-in :in airpoeket, nieans :tor aiiaehii'ie said rear wall panel. ineens attiva-hing said 'Front and rear walls to the 'iront and rear edgres of said. side walhey and strips ot soinulabsorbing parl:- inp; bordering the edges et all of said panels, lier danipening` the vibrations ol' the walls and panche and preventing escape of sound vibrations l'roin said air-pockets.

A sound-subdning casing for a typewriting machine, including av body-portion having; an opening at the front for the type Writer-keyboard to project `forwardly therethrough, said Casing also including a earriage-chainbei.' which overliangs the body of side walls and coextensive therewith to torni air-pockets, ineans attaching said panels to said side walls, a panel spaced from the rear Wall and co-extensive therewith to .torni an air-pocket, ineans tor attachinef said rear wall panel, ineens attaching said front and rear walls to the liront and rear edges of said side Walls, and strips ot' sonndoihsorbing packing bordering the edges et' all of said panels, :For dalnpeningthe vibrations ot the walls and panels7 and preventing escape ot sound `vibrations trein said air-pockets.

si. `sonnd-subduingr easing' for a type Writing machine, includingr a body-portion haring an opening at the lront for the typen'rftei-lneyboard to project forwardly therethrough, said casing` also including, a cai riage-chainber which overhanggs the body ol the casing, said body-portion including an open :front plate, and also including side walls and a rear Wall, said side walls diverging 'troni their bottoms to torni overhangs, the upper end of each side Wall forming a lower part ot said carriage-chainber7 means for attaching said side Walls to said rear Wall, panels being spaced troni said side walls and eoextensive therewith to torni air-pockets, means attaching said panels to said side Walls7 and nieans attaching said front and rear Walls to the front and rear edges oi said side Valls.

5. In a easing tor a typewriting machine including a traine and a keyboard, the coinbination oit a sectional body-part and a cover therefor, a ielt liniireY fast to the side of the trent Wall et said body-part, an opening through both the :t1-ont wall and the telt linineY throng-l1 which the keyboard protrndes, and means for :forcing the machine against the lining ot the trent wall for effectively enclosingthe noise in said casing, said ineans including1 a rock-shaft at the rear of the inachine having' mounted thereon at one end a shoe lfiearing` on the traine ol the niachine and having; at the other end a resilient arin and means :tor locking' said arin in its effective position.

A sonrufl-sulnluing' casingl :tor a typewriting machine, including a body-portion having an openingl at the 'front for the typewriter-keyboard to project forwardly therethrough, said body-,portion includingManthmifeor, -a spring'operatiwelyconnectedfor open-.frontiplate, .and also including' side walls and a .rear wall, lmeans iior attachin g said Aside walls -to said .rear-wall, ,p anels boing spaced tromsaid sidewalls and ceexten ive therewith to tterfm air-pockets, ineansattaching said panels to said side walls,iand means attaching said liront ,and rear walls to the front `and rear ledges offfsaid side iwal-ls.

7. The combination#withY :a: `typewrifting machine-coinprisingacauriage and a fingerpiece on said carriage, of' a sound--deadening casing for said machine, acoveran opening in the front of the casing formed by the cover being lett-partly open, through which the finger-piece extends, upper and lower cooperating cushions extending along said opening for effectively sealingk said opening against the emission of sound, said cushions comprising resilient telt wads in the form of strips abutting against each other, and means for removably supporting said felt strips, including metal strips fast one to the cover and the other to the casing, each metal strip extending the full length of said opening, each of said metal strips Vforming a channel in which the felt strip may be inserted, said channels opposed to each other.

8 The combination with a typewriting machine comprising a carriage and fingerpiece on said carriage, of a sound-deadening casing for said machine, a cover and a lock therefor, an opening in the front of the casing formed by the cover being lett partly Y open, through which the finger-piece. extends,

a cushion extending along both'sides ot said opening for effectively sea-ling said opening against the emission of sound, saidr cushions comprising` resilient telt wads in the Vform of strips abutting against each other, means for supportingisaid felt strips, and means for effecting relative adjustment of the felt strips.

9. The combination with a typewriting machine comprising a carriage and a fingerpiece on said carriage'. eta sound-deadening casing for said machine, a cover and a'lock therefor, an openiirg` in the frontof the casing formed by the cover being left partly open, through which the finger-piece extends, ai cushion extending along both sides of said opening for effectively sealing said opening against the emission of sound, said cushions comprising resilient felt wads in the form of strips abutting against each other and yielding locally to thengerpiece, means for supporting said felt strips and means for effectively adjusting the pressure of the felt strips one against the other, the latter means including an adjustable member co-operating with said lock for controlling the width of the opening between the casing and the cover therefor.

10. In a casing for a typewriting machine, including a body-part, a cover and a lock efli-ecti-vely raising said :coter when 5th,. lloc z is released, and means within the lock ter zu'ljgustnig` the :openingvforined between the body-,part and :thecoven'saicl means coinprising an adjustable plate co-operating with saidv lock 'for eiiective'ly controlling the width oit said opening. 1 f

ll. A sound-subduing for typeywriting machine including a body--portion4 lia-ning sin opening at v:the front for :typewriter-keyboard to project forwardly therethrough, said body-portion including an open front plate and also including side walls diverging from bottom to top and a rear wall, said side walls each cast in one piece with a bottom flange, means for attaching said side walls to said rear wall and said ti-ont wall, panels spaced from said side walls and coextensive therewith and secured against said flanges at their lower ends and having securing means at their upper ends, said panels being spaced from said side walls to form vair-aoclets, and means for attaching said frontand rear walls to the front and rear edges of said side walls.

12. A sound-subduing casing for a type-V writing machineincluding a body-portion having` an opening at the front for a typewriter-keyboard to project forwardly therethrough, said body-portion including an open front plate and also including side walls diverging from bottom to top and a rear wall, said sidewalls each cast yin one piece with a bottom flange, means for attaching said side walls to said rear wall and said front wall, panels spaced from said side walls `and coextensive therewith and secured against said flanges at their lower ends and having securing means at their upper ends, said panels being spaced from said side walls to form air-pockets, means for attaching said i'ront and rear walls to` the Vfront and rear edges of said side walls, and felt strips extending along the edges ot said pockets to seal the same.

13. A sound-subduiug casing for a typewriting machine including a body-portion having anopening atV the front for a typewriter-keyboard to project forwardly therethrough, said body-portion including' an open front plate and also including side walls diverging from bottom` to top and a rear wall, said side walls each cast inv one -piece with a bottom flange, means for attaching said side walls to said rear wall and said front wall, panels spaced from said side walls and coextensive therewith and secured against said fianges at their lower ends and and rear edges of said side walls, felt strips extending along. the edges ot said pockets lto seal the suine, and a panel spaced from said reni Wall and eo-opereting therewith to forni :1n air-pocket, means attaching said reni' panel to said rear plete and Suid side Wells, :1nd felt strips sealing.;` the edges of said rear pocket.

le.. In :t easing for u. typewrting machine including :a :traine und :L keyboard therefor, the eonibinntion ol at built-np body-portion including :t front section and e rear section fastened to end frames and mounted on :i

baseplate7 an opening n the front section through which the keyboard protrntles, n front Closure under seid keyboard including; un upwardly-extending portion which forms :Ln integral part of said hase-plate, :t felt lining on the inner side ott Seid closure, :nid menne for holding:y seid lining on seid closure, the hitter means eonlpiissingr a resilient strip supported :it the ends und bearing on the 20 lower edge of Suid felt lining. 1

WILLIAM A. DOBSON. 

